jennifer cohen fitness expert and author of "no gym required" has it all. hello. >> hello. >> whatever you're doing, it's working. >> we can't wait to see some of these contraptions. >> some of these are very funky looking. >> why drive to to use the gym when you can just drive to use the treadmill. >> it's not a joke. >> it's not a joke. it's an alternative to an actual bicycle. you can run on this contraption. it's a little more difficult than the normal treadmill. >> you drive down the street while you're running? >> you could. you require more balance than a typical credmill. >> what does that cost? >> the cost is pretty pricey, about $2500. so, yeah. >> i'll just run outside on the street. >> that's a cheaper and safer option. >> i've seen you run. >> but it's for the bored person, i suppose. >> she's going to be the model today for the flex belt. this is fda approved and it claims that if you use it 30 minutes a day for six weeks, you'll have a six-pack. >> dell us what's happening. >> right now there's an electric pulse going through the belt pad to